The Kalinka Optics Patriot mounts is the total upgrade of original Soviet BP-02 side mount. We just developed the new line of mounts to cover all AK, SVD, SKS, Mosin owner' needs. These rock solid mounts come centered over the weapon's bore line. The Picatinny rail measures 225 mm giving you an unprecedented range of scope positioning options. The bottom mount based on SVD design has two removable stops, the front one is to use for SVD style rails, the rear one is for AK style rails. So the only thing you need to convert your mount from AK to SVD version is to screw the SVD stopper in and unscrew the AK stopper or vice versa. Hex screws used now keep the mounts as strong as possible. The mounts are made of solid seluminium for extreme strength and will accept any standard Picatinny/Weaver rings. Standard X65 models sit 4 mm higher than classic BP-02 AK to Weaver Mount, Low Profile, Centered (AMBP02) so it sits ideally on any AK and clones. Fits Saiga, VEPR. This is the best mount we make and is a DEFINITE KALINKA 2015 BEST CHOICE!